What does duper mean?
Duper means a person who dupes another.
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/ˈduː.pə(ɹ)/ · noun
a person who dupes another.
Use duper when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Duper means a person who dupes another.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use duper where its definition matches the intended context.
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